Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii.

Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Research Abstract Details 

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Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Abstract Text:

Keith Josef,Jureepan Saranak,Kenneth W Foster,

In response to light stimulation Chlamydomonas reinhardtii changes the beating frequency, beating pattern, and beating synchrony of the trans and cis cilia to steer the freely-swimming cell relative to light sources. To understand the cell steering behavior the impulse responses of the beating frequency and stroke velocity of each cilium have been obtained with high temporal resolution on cells held with a micropipette. Interestingly the response of each cilium is quite different. The trans cilium responds with less delay than the cis cilium for both beating frequency and stroke velocity. For light stimulation at 2 Hz, the critical cell-rotation frequency, both responses of the trans and cis cilia are about 180 degrees out of phase. The trans-cilium beating frequency response peaks at a stimulus frequency of 5-6 Hz, higher than the cis at 1-2 Hz. The stroke velocities of the trans and cis cilia have the same stimulus-frequency response (2 Hz), but the trans cilium has a shorter delay than the cis. The times to maximum response are much shorter than the time for a rotation of the cell. The use of two different approaches that enable the trans cilium to respond ahead of the cis for both the beating frequency and stroke velocity responses suggests the importance of both responses to phototaxis. Internal cell processing responsible for the time course of the responses is proposed.

Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Publishing Authors By Initials

K Josef,J Saranak,KW Foster,

For similar biological phenomena, cell phenomena, and immunity: cell physiology: cell communication: signal transduction research abstracts see: biological phenomena, cell phenomena, and immunity: cell physiology: cell communication: signal transduction research

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Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Cell motility and the cytoskeleton

VOLUME: 63

Page Numbers: 758-77

Journal Abbreviation: Cell Motil. Cytoskeleton

ISSN: 0886-1544

DAY: 3

MONTH: Dec

YEAR: 2006

Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Information

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LANGUAGE: eng

NlmUniqueID: 8605339

Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii. Keywords Mesh Terms:

KEYWORDS: Signal Transduction

MESH TERMS: radiation effects

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Grant and Affiliation Information for Linear systems analysis of the ciliary steering behavior associated with negative-phototaxis in Chlamydomonas reinhardtii.

AFFILIATION: Physics Department, Syracuse University, Syracuse, New York 13244-1130, USA.

Country: United States

AGENCY: United States NIGMS

GRANT: GM63527

ACRONYM: GM

MEDLINETA: Cell Motil Cytoskeleton

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